Electromagnetically-controlled brake



Jan 23, 1923.

M. E. NEENAN ET AL. -ELECTROMAGNEIICALLY CONTROLLED BRAKF 2 SHEETS-SHEETif ORIGINAL FILED JUL'Y23, 1918.

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Jan: 23, 1923. Y 1,442,898. M. E. NEENAN ET AL.

ELECTROMAGNEIICALLY CONTROLLED BRAKE.

' ORIGINAL FILED JULY 23. 1918- 2 SHEETS-SHET Z.

IN VEN 70 R M55441 E IVEtW/I/V JOHN J NE E N AN Patented Jinn. 23,119233..

UNHTED stares rarest MICHAEL E. NEENAN AND JOHN J. NEENAN, OF NEW YORK,N. Y., ASSIG-NORS TO NEEIQ'AN ELEVATOR CORPORATION, A CORPORATION OF NEWYORK.

ELECTROMAGNETICALLY-CONTROLLED BRAKE.

Application filed July 23, 1918, Serial No. 246,409. Renewed July 8,1921.

To all whom it may concern:

Be it known that we, MICHAEL E. NEENAN and Join! 'J. NEENAN, citizens ofthe United trolled Brakes, of which the following is a'" specification.

This invention relates to improvements in the arrangement andconstruction bf electromagnetically controlled brakes particularlyadapted for the control of elevator or like apparatus. Thev device ofourpresent invention is designed particularly to produce a de: vice whichwill be positive and dependable in its action, durable, of well balancedconstruction and of an improved construction possessing a greatlyincreased area ofeifective braking surface whereby high efliciency inits operation is secured.

The described-and other valuable features of our invention areillustrated in the accompanyirig drawings wherein like referencecharacters are applied to the corresponding partsin theseveral views.

Referring to thedrawing, Fig. 1 is a View in side elevation illustratinga preferred em bodiment of the features of our invention. Fig. 2 is asimilar view from t e opposite side thereof. Figs. 3 and 4 are -news insideelevation showing desirable modified forms of the device. Fig. 5'isan end elevation of the embodiment shown in Fig. 1. Fig. 6 is a similarview of the construction shown in Fig. 2. Fig. 7 is a longitudinalsectional view of a desirable magnet construction. F ig. 8 is a similarview showing a modified forni thereof and Fig. 9 is a plan view of thebrake sho e supporting members of Fig. 1.

Referring to the drawings wherein we have shown desirable embodiments ofour invention, 1 indicates a brake drum or cylinder mounted upon theusual brake shaft 2 which in the manner'we'll understood is'connected tothe elevator, derrick, winch, or other apparatus to be controlled. I

In accordance with our invent-ion we provide oppositely arranged andpivotally supported brake members or brake shoes 3 and 4: to havefrictional braking engagement with the peripheral surface of the brakedrum 1. As shown, the brake members 3 and 4 are pivotally supported up abearing fierial No. 483,343.

pin 6 fitted to a supporting standard or base 7. The respective brakemembers 3 and 4 are each formed with their opposed or inner surfacessubstantially conforming in contour to the peripheral surface of thedrum 1, and upon their inner surfaces they are each provided withsuitable friction metal or other material best suited to produce thedesired braking eife'ct. Means are provided normally to exert pressureupon the brake members to force them into braking contact with the drum.A simple and efi'ective means is here shown for this purpose, con-,'sisting of a pressure bolt 8 fitting apertures in the upper endportions of each of the brake members above the drum and having its endsextending at each side outwardly from the brake members. The outwardlyextended ends of the bolt are threaded as shown to receive the bearingnuts 9 and lock nuts 10 and interposed between the bearing nuts andsuitable bearing shoulders 11 formed on the brake members thecompression springs 12 12 are arranged and held by suitable washers 1313. As readily understood the pressure of the springs 12 is regulated byadjusting the nuts 9 and the pressure thus determined normally will beefiective to press the brake members into engagement with the brakedrum 1. The arrangement as described is simple and substantial andemploys braking surfaces acting upon both sides of the brake drum andupon substantially the entire peripheral surfaceof the drum so as toobtain a very eifective braking effort. Moreover this arrangementasillustrated, requires but the single resilient or pressure element, ormeans, to actuate botlnof the brake-members and further .attendantuponthis arrangement the adjusting of te bearing nuts 9+9 determines thepressure to be exerted upon both of the brake memberswyhereby thebraking pressures are perfectly balanced, resulting in equal wear uponthe surfaces.

To release the brake when it is desired so as to permit the rotation ofthe drum, elec tro-magnetically operated means are employed, as hereshown, consisting of a magthe pressure of the springs 12 and away fromfrictional engagement with the drum. This may be effected with magnetsof various designs and arrangements.

In Figs. 1 and 2 we have shown a desirable construction wherein thebrake-members are each formed with outwardly extending arm portions14-14 which are formed and arranged in crossed-over relation to'overliethe drum and are provided with rearwardly directed opposed shoulders15-15. The magnet M is positioned between these shoulders,

being supported by a suitable bracket 16. This magnet may be ofconventional doublesolenoid type comprising a suitable coil 17 havingmovable armatures 18 -18 which are drawn inwardly under the influence'ofthe field of the coil when the latter is energized. As shown the outerend of the armamovement.

tures are passed through the shoulders 15 and have the nuts 19-19threaded on their outer ends to engage the shoulders. In the mannerreadily understood when the magnet is energized, its cores or armaturesare moved inwardly and the engagement of the nuts 19 with the shoulders-15 imparts the -movement to the brake members-whereby they are movedoutwardly away from the braking engagement with the drum and against theinfluence of the springs. By the described simple arrangement we havepro-- vided for theseparation of the brake mem-.

bers by a magnet employing inwardly drawn armatures.

In Figs. 3, 4,, 7 and we'have shown arrangements wherein'in accordancewith my invention special forms of magnets are employed whicharearranged to release the brake members by a separating or outward In theconstruction there shown the brake-members are each provided with anupwardly extending arm or shoulder 14 on its own side of the drum andthe magnet M employed is designed to impart an outwardly directedseparating movement thereto. a

In the'construction of igs. 3 and 7 the coil 17 is wound upon the coretube 21 to which are secured the usual retaining collars 22 22 for thecoil. These-parts are, as shown, supported in stationary position by asuitable bracket. The magnet is pro- .vided with the oppositely arrangedmov-' able armatures or solenoid cores 23--24 slid-.

30 passed through apertures in the shoulders 14 of the brake members 3and 4- and provided on their outer ends with retaining nuts 31 and alsoprovided with inner shoalders 33 to engage the shoulders 14 to imparttheoutward thrust thereto.

Means areshown adapted to limit the separating movement of the brakemembers consisting of a threaded rod 34 extending through both of theshoulders '14 and having stop nuts 36-86 on its outwardly extended.ends;

InFigs. 4 and 8 we have shown further desirable modification wherein themagnet coil is not stationary supported but is connected to and carriedby one of the brake members while the armature is connected to the otherof the brake'members. As shown, the ,coil support 40 has laterallyextending perforated ears 4l42. A pivoted pin 43 is fitted to one of theears and to the shoulder 14 of the brake member 4 whereas theperforation'of the eat 41 is in the form of a slot 44 in whichla pin 45carried by the brake-member?) is fitte d whereby the magnet coil issupportedand movably connected to one of the brake members 4 as shown.The armature 47 of the magnet as best shown in Fig. 8 is provided witlraconnection 49 which is connected-at its other end to the brake member 3.In this arrangement the slot 44 and pin fitted thereto may act to limitthe separating movement of the parts. \Vhile we have described andillustrated desirable embodiments of our invention it will be understoodthat many other modifications thereof can be made without departavingdescribed our invention, we claim:

ing engagement "and electro-magnetic means connected to the arm portionsof the respec" tive shoes and adapted to release the brake:

having arm portions at their upper ends ex;

tending inwardly to overlie the drum and each extending to the oppositeside of the neutral axis, resilient pressure. means operative to applyequal pressures upon each of the brake-shoes normally to force theminwardly into braking engagement with the drum, an electric magnetinterposedjbetween the arm portions of the shoesand having oppositelymovable armatures connected tothe respective arm portions and operativeto separate the brake-shoes when energi sed, su stantially as described;

3. "A device of the eeharacter described comprising a rotatable:drumwandqoppositely arranged movahle brake shoe' 77 adapted forfrictionalabraking engagement with the drum, said brake shoes having armportions at their upper ends extending inwardly to overliethe drum andeach-extendingto theop'posife side of the neutral axis, resilientpressure means operative to apfply each-'pressurehupon each of the brakermem b egs normally to force them into brak-' ing engagement with thedrum, means to adjust the pressure imparted by the pressure means,anelectro-ma-gnet interposed between the armpo'rtionsof the shoes andhaving 0ppositely movable armatures connected to the respective armportions and operative to separate the brake-shoes when ener ized.

4, A device of' the character. described comprising a rotatable drum-andoppositely arranged brake-shoes pivotally supported centrally below thedrum and adapted for frictional engagement with the drum, saidbrake-shoes having arm portions at their upper ends extending inwardlyover the drum to theoppositeside of the neutral axis thereof with' theirextremities in opposite V relation, a pressure bolt arranged to extend50 I members, adj ustablebearing nuts threaded on the ends ofsaidbolgficoinpression springs interposedbetweenthe-nuts-and thebrakeshoes and operative to force the shoes into braking engagement withthe drum and an electric solenoid ma net connected to the op posedextremities oi the arms and operative to releasethe shoes from thebraking engagement.

5. A device ofthe character described comprising a rotatable drum andoppositely arranged brake-shoes pivotally supported centrally below thedrum and adapted for frictional engagement with the opposite pespectivearms of the shoes,

members i ripl eral surfaces of' the drum. said brakeshoes having armportions at their upper ends extending inwardly over the drum to theopposite side of the neutral axis thereof with their extremities inopposite relation, a pressure-bolt arranged to extend out-wardly througheach of the brake-members, adjustable bearing nuts threaded on the endsof said bolt,' compression springs interposed between the nuts and thebrake-shoes and op-, erative to force theshoes into brakin contact withthe drum and a solenoid electric magnet connected to the opposedextremities of the arms and operative to release the shoes from brakingengagement and said solenoid having oppositely movable armatures andconnections from the armatures to the resubstantially as described.

6. A device of the character described comprising a rotatable drumsuitabl'y'journalled and oppositely arranged arcuate brake-shoe memberspivotally supported centrally with relation to the drum. said brakeshoes havingarm portions at their upper-ends extending inwardly over thedrum and each having its end portion extended to the opposite sideofthecentral vertical plane of the drum whereby the said end portions arein crossed relation, resilient pressure means operative to move the"brake-shoe members into braking en- ,m'embers pivotally supportedcentrally beneath the drum, said brake-shoes havin arm'portions at theirupper ends exten ing inwardly over the drum and each haviu its endportion extended to the opposite side of the central vertical-plane ofthe drum whereby the said end portions are in crossed relation,resilient pres- 7 sure means operative to move the 'brakeoutwardlythrough each of the brake-shoe.

shoe members into braking engagement and Signed at New York city in thecounty of New York and State of New York this 3d vday of June A.

D.,' 1918. I MICHAEL E. NEENAN. 1 JOHN J. NEENAN. Witnesses:

SAMPSON H, SCHWARZ, CLARENCE S. AsHLE'Y.

